CN211251173U - Plastic face shell injection mold - Google Patents

Abstract

The utility model discloses a plastic face-piece injection mold is provided with movable mould subassembly and cover half subassembly, and movable mould subassembly and cover half subassembly set up respectively on the injection molding machine. The curved surface forming blocks and the cambered surface forming blocks are arranged, so that an arc-shaped groove can be formed on the plastic face shell, and meanwhile, the arrangement of the cambered surface reinforcing gap enables the rubber material to form a reinforcing strip at a position close to the arc-shaped groove on the plastic face shell, so that the arc-shaped groove is reinforced, and the arc-shaped groove is prevented from cracking in the working process; the clearance eliminating groove is formed, so that a convex strip can be formed on the face shell and is tightly abutted against the part, and the fit clearance between the face shell and the part is eliminated; the arrangement of the shaft hole forming column and the arrangement of the shaft hole injection molding groove and the shaft hole forming groove enable a shaft sleeve to be formed on the face shell, and radial runout generated when an output shaft of the power element rotates can be transmitted to the shaft sleeve; the reinforcing rib forming grooves are formed, so that reinforcing ribs are formed on the shaft sleeve, and the strength of the shaft sleeve is improved.

Description

Plastic face shell injection mold

Technical Field

The utility model relates to an injection mold technical field especially relates to a plastic face-piece injection mold.

Background

At present, shells of various electronic components are made of plastic materials, and the shells play roles in protecting and supporting various components. In addition, different types of plastics have different physical properties and chemical properties, and the material cost of the plastics is relatively low, so that the plastic shells are more and more widely applied. The plastic surface shell is generally manufactured by an injection molding process, specifically, molten rubber is injected into a surface shell molding cavity in a plastic surface shell injection mold, the plastic surface shell is formed after the rubber in the surface shell molding cavity is cooled, and then the finished plastic surface shell is processed.

The method for manufacturing the plastic shell by injecting the rubber material into the plastic shell injection mold through the injection molding machine is very convenient, however, the existing plastic shell injection mold has the following defects in the injection molding process:

firstly, the plastic face shell generally plays a role in supporting and fixing, so that the outline of the plastic face shell is generally matched with other parts, and for some parts with arc surface designs on the surfaces, the same arc surface is arranged on the injection mold, so that an arc-shaped groove matched with the parts can be formed after the rubber material is cooled;

secondly, a fixing groove for a part is formed in a plastic surface shell which is injected by the existing injection mold, and when the plastic surface shell is specifically applied, the part falls into the fixing groove, but a certain shrinkage of a sizing material occurs in a cooling process, so that a certain fit clearance exists between the part and the fixing groove, and the degree of fit between the plastic surface shell which is injected by the injection mold and the part is low;

in addition, when the surface shell is required to be sleeved on the output shaft of power elements such as a motor, a water pump and the like, when the output shaft rotates, the output shaft can generate certain radial jumping, so that certain extrusion is generated on the plastic surface shell, and when the jumping amount is too large, the plastic surface shell is easy to crack.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a novel shell which can prevent the arc-shaped groove from cracking in the process of supporting and fixing parts, thereby improving the durability of the shell; the fit clearance between the plastic surface shell and the parts can be reduced as much as possible; and can prevent the plastic face shell injection mold that the face shell damaged because of the radial runout volume is too big.

The purpose of the utility model is realized through the following technical scheme:

a plastic face-piece injection mold, comprising:

the movable mold assembly comprises a movable mold plate and a plurality of cambered surface molding blocks, a glue inlet channel and an injection molding groove are formed in the movable mold plate, the glue inlet channel is communicated with the injection molding groove, a shaft hole molding groove is formed in the injection molding groove, a reinforcing rib molding groove is formed in the side wall of the shaft hole molding groove, each cambered surface molding block is arranged in the injection molding groove, a molding cambered surface is arranged on each cambered surface molding block, and a cambered surface reinforcing gap is formed between every two adjacent cambered surface molding blocks; and

the fixed die assembly comprises a fixed die plate, a shaft hole forming column, an assembling forming block and a curved surface forming block, wherein a shaft hole injection molding groove is formed in the fixed die plate, the shaft hole forming column is arranged in the shaft hole injection molding groove, the assembling forming block is arranged on the fixed die plate, the side wall of the assembling forming block is inwards sunken to form a clearance eliminating groove, the curved surface forming block is arranged on the fixed die plate, and a forming curved surface is arranged on the curved surface forming block;

when the movable template is used for moving towards the direction close to the fixed template, the injection molding groove and the fixed template jointly enclose a surface shell molding cavity, the shaft hole molding column is inserted into the shaft hole molding groove, and the assembly molding block and the curved surface molding block are respectively inserted into the injection molding groove.

In one embodiment, the sidewall of the shaft hole forming groove is provided with a plurality of the bead forming grooves, and each bead forming groove is circumferentially distributed around the central axis of the shaft hole forming groove.

In one embodiment, the depth of the gap-eliminating groove is gradually reduced toward the fixed die plate.

In one embodiment, in one of the forming shoe, the forming shoe comprises a base portion, an arc portion and a connecting portion connected in series, and the forming shoe is located on the arc portion.

In one embodiment, the base portion, the arc portion and the connecting portion are integrally formed.

In one of them embodiment, the cover half subassembly still includes counter sink formed part, counter sink formed part set up in on the fixed die plate, the movable mould board is used for towards being close to when the direction of fixed die plate removed, make counter sink formed part insert in the injection moulding inslot.

In one embodiment, the fixed mold assembly further comprises an orientation identification mark, and the orientation identification mark is arranged on the fixed mold plate.

In one embodiment, a round corner is arranged at the edge position of the movable template.

In one embodiment, the shaft-hole forming groove has a circular cross section.

In one embodiment, the bead-forming groove has a depth of 0.90mm to 1.10 mm.

Compared with the prior art, the utility model discloses advantage and beneficial effect below having at least:

the utility model discloses a plastic face-piece injection mold is provided with movable mould subassembly and cover half subassembly, and movable mould subassembly and cover half subassembly set up respectively on the injection molding machine. The curved surface forming blocks and the cambered surface forming blocks are arranged, so that an arc-shaped groove can be formed on the plastic face shell, and meanwhile, the arrangement of the cambered surface reinforcing gap enables the rubber material to form a reinforcing strip at a position close to the arc-shaped groove on the plastic face shell, so that the arc-shaped groove is reinforced, and the arc-shaped groove is prevented from cracking in the working process; the clearance eliminating groove is formed, so that a convex strip can be formed on the face shell and is tightly abutted against the part, and the fit clearance between the face shell and the part is eliminated; the arrangement of the shaft hole forming column and the arrangement of the shaft hole injection molding groove and the shaft hole forming groove enable a shaft sleeve to be formed on the face shell, and radial runout generated when an output shaft of the power element rotates can be transmitted to the shaft sleeve; the reinforcing rib forming grooves are formed, so that reinforcing ribs are formed on the shaft sleeve, and the strength of the shaft sleeve is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a plastic surface shell injection mold according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a movable mold assembly according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the movable die assembly shown in FIG. 2 at A;

FIG. 4 is a schematic structural diagram of a stationary mold assembly according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the stationary mold assembly shown in FIG. 4 at B;

FIG. 6 is a schematic structural view of a plastic panel;

fig. 7 is a schematic structural view of the plastic panel.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the plastic surface shell injection mold 10 includes a movable mold assembly 100 and a fixed mold assembly 200, the movable mold assembly 100 and the fixed mold assembly 200 are respectively disposed on an injection molding machine, the fixed mold assembly 200 is driven by the movable mold assembly 100 to move toward the fixed mold assembly 200, so that the movable mold assembly 100 and the fixed mold assembly 200 together form a surface shell molding cavity, and the surface shell molding cavity is used for molding a plastic surface shell.

Referring to fig. 2 and fig. 3, the movable mold assembly 100 includes a movable mold plate 110 and a plurality of arc-shaped molding blocks 120, the movable mold plate 110 is provided with a glue inlet channel 111 and an injection molding groove 112, the glue inlet channel 111 is communicated with the injection molding groove 112, the injection molding groove 112 is provided with an axle hole molding groove 113, the side wall of the axle hole molding groove 113 is provided with a reinforcing rib molding groove 114, each arc-shaped molding block 120 is disposed in the injection molding groove 112, each arc-shaped molding block 120 is provided with a molding arc 1222, and an arc-shaped reinforcing gap 130 is disposed between two adjacent arc-shaped molding blocks 120.

Thus, it should be noted that the movable mold plate 110 plays a role in mounting and fixing each arc-shaped forming block 120; the arc-shaped forming block 120 is arranged, so that an arc-shaped groove can be formed on the plastic surface shell; the injection molding machine can inject the glue stock into the injection molding groove 112 through the glue inlet channel 111; the injection molding groove 112 is used for enclosing a surface shell molding cavity together with the fixed mold plate 210; the shaft hole forming groove 113 is formed, so that the rubber can form a shaft sleeve on the surface shell; the reinforcing rib forming grooves 114 are formed, so that the rubber material can form reinforcing ribs on the shaft sleeve, and the mechanical strength of the shaft sleeve is improved; the molding cambered surface 1222 plays a role in guiding the glue to be molded for multiple purposes according to a preset shape, and the glue can be molded only along the contour of the molding cambered surface 1222, so that an arc-shaped groove can be formed in the panel shell; the setting of cambered surface reinforcement clearance 130 for the sizing material can be filled cambered surface reinforcement clearance 130, thereby close on the position department of arc groove and form the reinforcement strip on the face-piece, thereby strengthened the mechanical strength of arc groove cell wall, and then prevent that the arc groove from taking place phenomenons such as fracture because of the atress is too big in the course of the work, improved the durability of plastic face-piece.

Referring to fig. 4 and 5, the fixed mold assembly 200 includes a fixed mold plate 210, an axial hole forming column 220, an assembling mold block 230 and a curved surface forming block 240, the fixed mold plate 210 is provided with an axial hole injection molding groove 211, the axial hole forming column 220 is disposed in the axial hole injection molding groove 211, the assembling mold block 230 is disposed on the fixed mold plate 210, a side wall of the assembling mold block 230 is recessed inward to form a gap eliminating groove 231, the curved surface forming block 240 is disposed on the fixed mold plate 210, and the curved surface forming block 240 is provided with a forming curved surface 241.

Thus, it should be noted that the fixed mold plate 210 is used for installing and fixing the shaft hole forming column 220, the assembling forming block 230 and the curved surface forming block 240; the shaft hole molding column 220 and the shaft hole injection molding groove 211 are jointly used for molding the shaft sleeve; the assembling type block 230 is arranged, so that the glue can be cooled and formed along the side wall of the assembling type block 230, and a mounting plate for mounting parts can be formed on the panel shell; the clearance eliminating groove 231 is formed, so that a convex strip can be formed on the mounting plate, when the parts are mounted, the convex strip can be tightly propped against the parts, the matching clearance between the parts and the mounting plate is eliminated, and the matching degree between the plastic surface shell of the injection molding finished product and the parts is improved; the curved surface forming block 240 is used for forming an arc-shaped groove on the plastic surface shell; the glue material is cooled and formed under the guidance of the forming curved surface 241, and finally an arc-shaped groove corresponding to the forming curved surface 241 can be formed on the surface shell.

Referring to fig. 3 and 5, when the movable mold plate 110 is moved toward the fixed mold plate 210, the injection molding groove 112 and the fixed mold plate 210 together form a face-shell molding cavity, the shaft-hole molding post 220 is inserted into the shaft-hole molding groove 113, and the assembly molding block 230 and the curved surface molding block 240 are respectively inserted into the injection molding groove 112.

Therefore, it should be noted that, in the actual injection molding process, when injection molding is required, the injection molding machine drives the movable mold plate 110 to move toward the direction close to the fixed mold plate 210, and finally the movable mold plate 110 is tightly attached to the fixed mold plate 210, so that the mold closing of the movable mold plate 110 and the fixed mold plate 210 is completed, and further the molding groove 112 and the fixed mold plate 210 jointly enclose a face shell molding cavity for molding a plastic face shell.

Next, it should be noted that the glue entering the dough cover forming cavity from the glue inlet channel 111 fills the space in the dough cover forming cavity. Specifically, the method comprises the following steps:

the sizing material flowing between the shaft hole molding groove 113 and the shaft hole molding column 220 is cooled and molded into a partial shaft sleeve, the sizing material flowing between the shaft hole injection molding groove 211 and the shaft hole molding column 220 is cooled and molded into the rest part of shaft sleeve, and finally the shaft sleeve can be formed on the plastic surface shell;

the rubber material flowing into the reinforcing rib forming groove 114 is cooled and formed into a reinforcing rib, and the reinforcing rib forming groove 114 is communicated with the shaft hole forming groove 113, so that the reinforcing rib can be formed on the shaft sleeve finally;

the glue material flowing between the arc forming block 120 and the curved surface forming block 240 is cooled and formed along the gap between the forming arc 1222 and the forming curved surface 241, and finally an arc-shaped groove can be formed on the plastic surface shell;

the glue material flowing into the arc surface reinforcing gap 130 is cooled and formed into a reinforcing strip, and finally the reinforcing strip can be formed on the plastic surface shell at the position close to the arc groove, so that the strength of the arc groove is enhanced, and the phenomena of cracking and the like of the groove wall of the arc groove are prevented;

the glue material, which is in close contact with the side walls of the assembled form blocks 230, will cool and form into a mounting plate for mounting parts; the plastic material flowing into the clearance elimination groove 231 is cooled and formed into a raised line on the mounting plate, and in the actual use process, the raised line made of the plastic material has certain elasticity and can tightly abut against the parts mounted on the mounting plate, so that the fit clearance between the surface shell and the parts is eliminated.

In order to better understand the technical solution of the present invention, please refer to fig. 5 and fig. 6 together, the plastic face shell injection mold 10 is injection molded to obtain the plastic face shell 400 as shown in fig. 5 and fig. 6, during the injection molding process, a mounting plate 410 for mounting parts is formed on the plastic face shell 400, and a protruding strip 420 for supporting the parts is further formed on the mounting plate 410; the plastic shell 400 is further formed with a shaft sleeve 430, and the side wall of the shaft sleeve 430 is further formed with a reinforcing rib 440; meanwhile, the plastic panel 400 is further formed with an arc-shaped groove 450, and the arc-shaped groove 450 is further formed with a reinforcing strip 460.

Referring to fig. 3 again, a plurality of reinforcement molding grooves 114 are formed on the sidewall of the shaft hole molding groove 113, and each reinforcement molding groove 114 is circumferentially distributed around the central axis of the shaft hole molding groove 113.

In this way, it should be noted that, the bead forming grooves 114 are circumferentially distributed around the central axis of the shaft hole forming groove 113, so that the strength at each position on the finally formed shaft sleeve is equal, and the damage to the shaft sleeve due to too low local strength is avoided.

Referring to fig. 5 again, the depth of the gap elimination groove 231 is gradually decreased toward the fixed die plate 210.

Thus, it should be noted that, by setting the depth of the gap eliminating groove 231 to be gradually changed, the height of the convex strip of the final molding is gradually reduced toward the direction away from the plastic surface shell, so that when a worker assembles parts, the convex strip can play a role in helping the worker to quickly assemble the parts.

Referring to fig. 3 again, in one arc forming block 120, the arc forming block 120 includes a base portion 121, an arc portion 122 and a connecting portion 123 connected in sequence, the base portion 121, the arc portion 122 and the connecting portion 123 are respectively disposed on the movable mold plate 110, and the forming arc 1222 is located on the arc portion 122.

As described above, the base portion 121 is attached to the movable die plate 110; the arc-shaped part 122 is used for guiding the rubber material to be cooled and formed along the surface of the arc-shaped part 122, so that the rubber material can form an arc-shaped groove on the plastic shell; the connecting portion 123 is used for being mounted on the movable die plate 110.

Referring to fig. 3 again, the base portion 121, the arc portion 122 and the connecting portion 123 are integrally formed.

In this way, it should be noted that, the base portion 121, the arc portion 122 and the connecting portion 123 are integrally formed, so that the mechanical strength of the arc forming block 120 can be improved, and the durability of the plastic surface shell injection mold can be improved.

Referring to fig. 5 again, the stationary mold assembly 200 further includes a counter bore molding member 250, the counter bore molding member 250 is disposed on the stationary mold plate 210, and the movable mold plate 110 is used for inserting the counter bore molding member 250 into the injection molding groove 112 when moving toward the stationary mold plate 210.

It should be noted that the countersunk member 250 is disposed such that the glue can only be molded along the sidewall of the countersunk member 250, so that a countersunk hole can be formed in the plastic panel.

Referring again to FIG. 4, the stationary mold assembly 200 further includes an orientation identifier 260, the orientation identifier 260 being disposed on the stationary mold plate 210.

In this way, it should be noted that the position identification mark 260 is arranged, so that a worker can determine the correct installation position of the fixed mold plate 210 quickly according to the positions of the position identification mark 260 and the fixed mold plate 210, and the efficiency of installing the fixed mold assembly 200 on the injection molding machine by the worker is improved.

Referring to fig. 2 again, the edge of the movable platen 110 is provided with a rounded portion 115.

In this way, it should be noted that the round portion 115 can prevent the stress concentration from occurring at the edge of the movable die plate 110 during the collision, that is, prevent the edge of the movable die plate 110 from being damaged due to the stress concentration during the collision.

Referring again to fig. 3, the shaft-hole forming groove 113 has a circular cross section.

In this way, the sizing material located between the groove wall of the shaft-hole forming groove 113 and the side wall of the shaft-hole forming column 220 forms a cylindrical sleeve after cooling forming.

Referring to fig. 3 again, the depth of the bead reinforcement forming groove 114 is 0.90mm to 1.10 mm.

In this way, the bead forming groove 114 is set to a depth of 0.90mm to 1.10mm, and the bead on the boss is also set to a thickness of 0.90mm to 1.10 mm.

Compared with the prior art, the utility model discloses advantage and beneficial effect below having at least:

the utility model discloses a plastic face-piece injection mold is provided with movable mould subassembly and cover half subassembly, and movable mould subassembly and cover half subassembly set up respectively on the injection molding machine. The curved surface forming blocks and the cambered surface forming blocks are arranged, so that an arc-shaped groove can be formed on the plastic face shell, and meanwhile, the arrangement of the cambered surface reinforcing gap enables the rubber material to form a reinforcing strip at a position close to the arc-shaped groove on the plastic face shell, so that the arc-shaped groove is reinforced, and the arc-shaped groove is prevented from cracking in the working process; the clearance eliminating groove is formed, so that a convex strip can be formed on the face shell and is tightly abutted against the part, and the fit clearance between the face shell and the part is eliminated; the arrangement of the shaft hole forming column and the arrangement of the shaft hole injection molding groove and the shaft hole forming groove enable a shaft sleeve to be formed on the face shell, and radial runout generated when an output shaft of the power element rotates can be transmitted to the shaft sleeve; the reinforcing rib forming grooves are formed, so that reinforcing ribs are formed on the shaft sleeve, and the strength of the shaft sleeve is improved.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a plastic face-piece injection mold which characterized in that includes:

the movable mold assembly comprises a movable mold plate and a plurality of cambered surface molding blocks, a glue inlet channel and an injection molding groove are formed in the movable mold plate, the glue inlet channel is communicated with the injection molding groove, a shaft hole molding groove is formed in the injection molding groove, a reinforcing rib molding groove is formed in the side wall of the shaft hole molding groove, each cambered surface molding block is arranged in the injection molding groove, a molding cambered surface is arranged on each cambered surface molding block, and a cambered surface reinforcing gap is formed between every two adjacent cambered surface molding blocks; and

the fixed die assembly comprises a fixed die plate, a shaft hole forming column, an assembling forming block and a curved surface forming block, wherein a shaft hole injection molding groove is formed in the fixed die plate, the shaft hole forming column is arranged in the shaft hole injection molding groove, the assembling forming block is arranged on the fixed die plate, the side wall of the assembling forming block is inwards sunken to form a clearance eliminating groove, the curved surface forming block is arranged on the fixed die plate, and a forming curved surface is arranged on the curved surface forming block;

when the movable template is used for moving towards the direction close to the fixed template, the injection molding groove and the fixed template jointly enclose a surface shell molding cavity, the shaft hole molding column is inserted into the shaft hole molding groove, and the assembly molding block and the curved surface molding block are respectively inserted into the injection molding groove.

2. The plastic face shell injection mold of claim 1, wherein the sidewall of the axial hole forming groove has a plurality of the bead-forming grooves, and each bead-forming groove is circumferentially distributed around a central axis of the axial hole forming groove.

3. The plastic face shell injection mold of claim 1, wherein the depth of the gap elimination groove gradually decreases toward the direction of the fixed mold plate.

4. The plastic face shell injection mold of claim 1, wherein in one of the arc-shaped forming blocks, the arc-shaped forming block comprises a base portion, an arc-shaped portion and a connecting portion connected in sequence, the base portion, the arc-shaped portion and the connecting portion are respectively disposed on the movable mold plate, and the forming arc is located on the arc-shaped portion.

5. The plastic face shell injection mold of claim 4, wherein the base portion, the arcuate portion and the connecting portion are integrally formed.

6. The plastic face shell injection mold of claim 1, wherein the fixed mold assembly further comprises a counter bore forming part, the counter bore forming part is disposed on the fixed mold plate, and the movable mold plate is used for inserting the counter bore forming part into the injection molding groove when moving towards a direction close to the fixed mold plate.

7. The plastic face shell injection mold of claim 1, wherein the stationary mold assembly further comprises an orientation identification mark, the orientation identification mark being disposed on the stationary mold plate.

8. The plastic face shell injection mold of claim 1, wherein a rounded corner is provided at an edge position of the movable mold plate.

9. The plastic face shell injection mold of claim 1, wherein the shaft hole forming groove has a circular cross section.

10. The plastic face shell injection mold of claim 1, wherein the bead molding groove has a depth of 0.90mm to 1.10 mm.

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